| Owensboro to Popovo | 5,451.71 mi (8,773.68 km) |
| Owensboro to Provadia | 5,503.91 mi (8,857.69 km) |
| Owensboro to Radnevo | 5,489.27 mi (8,834.13 km) |
| Owensboro to Radomir | 5,363.70 mi (8,632.05 km) |
| Owensboro to Rakitovo | 5,433.14 mi (8,743.79 km) |
| Owensboro to Rakovski | 5,453.04 mi (8,775.82 km) |
| Owensboro to Razgrad | 5,453.68 mi (8,776.85 km) |
| Owensboro to Razlog | 5,413.79 mi (8,712.65 km) |
| Owensboro to Ruse | 5,419.40 mi (8,721.68 km) |
| Owensboro to Samokov | 5,396.70 mi (8,685.14 km) |
| Owensboro to Sandanski | 5,420.86 mi (8,724.03 km) |
| Owensboro to Sevlievo | 5,424.77 mi (8,730.32 km) |
| Owensboro to Shumen | 5,480.76 mi (8,820.44 km) |
| Owensboro to Silistra | 5,453.65 mi (8,776.80 km) |
| Owensboro to Sliven | 5,486.48 mi (8,829.64 km) |
